<template>
	<el-container class="home">
		<el-header>
			<div>
				<img src="../assets/heima.png" alt="" />
				<span>电商后台管理系统</span>
			</div>
			<el-button type="info" @click="logout">退出</el-button>
		</el-header>
		<el-container>
			<el-aside :width="isCollapse ? '64px' : '200px'">
				<div class="toggle-button" @click="toggleCollapse">|||</div>
				<!--侧边栏菜单区域-->
				<el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" 
					:unique-opened="true" :collapse="isCollapse" :collapse-transition="false" :router="true" :default-active="'/'+activePath">
					<!--一级菜单-->
					<el-submenu  :index="item.id+''" v-for="item in menuList" :key="item.id">
						<!--一级菜单的模板区域-->
						<template slot="title">
							<!--图标-->
							<i :class="iconsObj[item.id]"></i>
							<!--文本-->
							<span>{{item.authName}}</span>
						</template>
						<!--二级菜单-->
						<el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNav(subItem.path)">
							<template slot="title">
								<!--图标-->
								<i class="el-icon-menu"></i>
								<!--文本-->
								<span>{{subItem.authName}}</span>
							</template>
						</el-menu-item>
					</el-submenu>
				</el-menu>
			</el-aside>
			<el-main>
				<router-view></router-view>
			</el-main>
		</el-container>
	</el-container>
</template>

<script>
	export default {
		data(){
			return {
				menuList:[],
				iconsObj:{
					"125":"iconfont icon-user",
					"103":"iconfont icon-tijikongjian",
					"101":"iconfont icon-shangpin",
					"102":"iconfont icon-danju",
					"145":"iconfont icon-baobiao"
				},
				//是否折叠
				isCollapse:false,
//				被激活的链接地址
				activePath:""
			}
		},
		created(){
			this.getMenuList();
			this.activePath=window.sessionStorage.getItem("activePath");
		},
		methods: {
			logout() {
				window.sessionStorage.clear();
				this.$router.push("/login");
			},
			//获取菜单
			async getMenuList(){
				const {data:res} = await this.$http.get("menus");
				if(res.meta.status !== 200) return this.$message.error(res.meta.msg);
				this.menuList = res.data;
			},
			//折叠和展开菜单
			toggleCollapse(){
				this.isCollapse=!this.isCollapse
			},
			//保存链接的激活状态
			saveNav(path){
				window.sessionStorage.setItem("activePath",path);
				this.activePath=path;
			}
		}
	};
</script>
<style lang="less" scoped>
	.home {
		height: 100%;
	}
	
	.el-header {
		background: #373d41;
		display: flex;
		justify-content: space-between;
		padding-left: 0;
		align-items: center;
		color: #FFF;
		font-size: 20px;
		>div {
			display: flex;
			align-items: center;
			span {
				margin-left: 15px;
			}
		}
	}
	
	.el-aside {
		background: #333744;
		.el-menu{
			border-right: none;
		}
	}
	
	.el-main {
		background: #eaedf1;
	}
	.iconfont{
		margin-right: 10px;
	}
	.toggle-button{
		background: #4A5064;
		font-size: 10px;
		line-height: 24px;
		color: #FFF;
		text-align: center;
		letter-spacing: 0.2em;
		cursor: pointer;
	}
</style>